package test_2_28;

public class The_Nine {
    public static void main(String[] args) {
        int count=0;
        for(int i=1;i<100;i++)
        {
            if(i%10==9)
            {
                count++;
            }
            if(i/10==9)
            {
                count++;
            }
        }
        System.out.println("共有"+count+"个数");
    }
}
